This problem (SPV not working properly) has been covered in this forum on several threads. Do a search using "Manitou SPV" -- that should get you started. Typically, the blue SPV piston in the damper assembly gets stuck. The source of the problem has been blamed on swelling of the tiny 'O' rings inside the piston. Manitou uses a special non-petroleum (silicon based) grease to lube these seals. Once the grease wears off, the 'O' rings react with the damping oil and swell up, causing the piston to react slowly and eventually not move at all. You can obtain this grease at your local scuba diving shop -- it is used to lubricate mouthpieces and masks.mtbdcd said:I have a R7 Platinum where the SPV seems to not work anymore. That might be a blessing have not decided for sure yet.
Anyway, fork is about a year old. Anybody have similiar experience and what did it take to fix?
Use the Advanced Search feature to select only the "Let's Talk About Shocks" forum, then plug in the "Manitou SPV" search criteria -- that should narrow your search considerably. Here are some threads I found by searching in that manner:mtbdcd said:Thanks.
I did do a search for SPV before posting and nothing found. Will broaden it to include Manitou.
Thanks for finding the links.FrankinMich said:Use the Advanced Search feature to select only the "Let's Talk About Shocks" forum, then plug in the "Manitou SPV" search criteria -- that should narrow your search considerably. Here are some threads I found by searching in that manner:
Too little air in the SPV chamber can also cause clunking, even when the piston is working properly. On the "Snap Valve" SPV try and keep it above 40 PSI.yts said:Hello,
got a R7 Platinum too. Is the clunking sound I heard from my fork is related to this grease on the SPV blue piston ?
Thanks a lot,
Snap Valve or Evolve?GrantB said:I took my fork apart a few weeks ago to change fluids and install some new seals. I noticed at the time that I couldn't quite compress the gold SPV valve to a flush state against the rest of the assembly when squeezing it by hand. Is this the result of the o ring bloat? I'm pretty sure the SPV isn't working properly.
Whatever the case, the SPV valve in its present state with new fluids in the fork makes for a nice ride that still gives me plenty of low speed compression damping. I just kind of asssumed that the SPV valve had "devolved" on its own.
If I were to open up the fork again, why wouldn't I need all new o rings for the interior of the SPV damper?
Thanks. It "came with the (new) bike".GrantB said:Dig the new avatar. Snap valve.